What was found
ENGINE WAS REMOVED FROM SERVICE DUE TO A DAMAGE IN C9 BLADE (AREA "E") OUTSIDE BLENDABLE LIMITS ACCORDING TO P&W ENGINE MANUAL. THE DENT WAS DISCOVERED BY BOROSCOPE INSPECTION. DEPTH OF DAMAGE= APPROX .037 , BLEND LIMIT =.031. DURING SHOPVISIT THE BLADE WAS MISTAKENLY BLENDED INSTEAD OF REPLACED AS THE ENGINE WORKSCOPE MANDATED. ENGINE WAS APPROVED FOR RETURN TO SERVICE WITH THE DEFECTIVE CONDITION UNDETECTED. CUSTOMER (LEASE COMPANY) AND CURRENT OPERATOR HAS BEEN NOTIFIED OF THE UNAIRWORTHY CONDITION. ROOT CAUSE INVESTIGATION IN PROGRESS.